Study on the Effect of Amphoteric Bagasse Hemicellulose on Heavy Metal Adsorption

Abstract

In this paper, ions i.e. Cu2+, Pb2+and Cd2+ were absorbed by the amphoteric bagasse hemicelluloses, and the influences of pH value, adsorption time and the initial concentration of metal ion have been studied. The results show that the optimal adsorption pH values for Cu2+, Pb2+ and Cd2+ are 6.5, 6.0 and 7.5, respectively. The adsorption capacity to ions Cu2+, Pb2+ and Cd2+ reaches the maximum values when the adsorption time is 180 min. Net adsorption to ions Cu2+, Pb2+ and Cd2+ increases with increasing the initial concentration of the metal ions. Analysis results of adsorption dynamics show that the adsorption of Cu2+, Pb2+ and Cd2+ follows Ho 's Pseudo second-order kinetics linear model. It can be seen from the adsorption isothermal research that absorption of the amphoteric bagasse hemicelluloses to ions Cu2+, Pb2+and Cd2+ can be well described by the Langmuir isotherm linear model. Moreover, the theoretical values of the maximum absorption capacity qmax for ions Cu2+, Pb2+ and Cd2+ were determined to be 21.98 mg/g, 81.97 mg/g and 31.85 mg/g, respectively.

Adsorption of Cu2+ and Ni2+ from Aqueous Solution by Arabinoxylan Hydrogel: Equilibrium, Kinetic, Competitive Adsorption

“…Therefore, AX has great potential application in producing bioadsorbent for heavy metal ion removal. Wang et al (17,18) reported the applications of carboxyl hemicelluloses-based adsorbents in adsorption of metal ions. However, further improvement in the absorption capacity of metal ion is required by introduction of more ligands in hemicelluloses.…”

Experimental study on adsorption characteristics of Cu2+ and Zn2+ by datong lignite

“…The maximum adsorption capacity of HPC for Cu was 56.4 mg/g. Lijun Wang et al[34] explored the adsorption of Cu, Pb and Cd by bagasse.convenient to obtain lignite in the mining area when treating AMD. The isothermal adsorption…”